/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/hard2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 03:34:24,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 03:34:24,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 03:34:24,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 03:34:24,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 03:34:24,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 03:34:24,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 03:34:24,166 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-31 03:34:24,195 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 03:34:24,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 03:34:24,196 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-31 03:34:24,196 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-31 03:34:24,196 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-31 03:34:24,196 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-31 03:34:24,197 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-31 03:34:24,197 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-31 03:34:24,197 INFO L138 SettingsManager]: * Use SBE=true [2022-01-31 03:34:24,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 03:34:24,201 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 03:34:24,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 03:34:24,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 03:34:24,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 03:34:24,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 03:34:24,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 03:34:24,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 03:34:24,202 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 03:34:24,202 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 03:34:24,202 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 03:34:24,202 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 03:34:24,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 03:34:24,202 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 03:34:24,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 03:34:24,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 03:34:24,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 03:34:24,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-31 03:34:24,204 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-31 03:34:24,204 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 03:34:24,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-31 03:34:24,205 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-31 03:34:24,205 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-31 03:34:24,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 03:34:24,205 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 03:34:24,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 03:34:24,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 03:34:24,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 03:34:24,454 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 03:34:24,465 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 03:34:24,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/hard2.c [2022-01-31 03:34:24,526 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3859021c/e187086f399a40579a2f16d6ccdc8f0d/FLAG317d8b58d [2022-01-31 03:34:24,864 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 03:34:24,864 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard2.c [2022-01-31 03:34:24,872 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3859021c/e187086f399a40579a2f16d6ccdc8f0d/FLAG317d8b58d [2022-01-31 03:34:25,294 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3859021c/e187086f399a40579a2f16d6ccdc8f0d [2022-01-31 03:34:25,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 03:34:25,301 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 03:34:25,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 03:34:25,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 03:34:25,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 03:34:25,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 03:34:25" (1/1) ... [2022-01-31 03:34:25,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15f3aa31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:34:25, skipping insertion in model container [2022-01-31 03:34:25,308 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 03:34:25" (1/1) ... [2022-01-31 03:34:25,313 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 03:34:25,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 03:34:25,458 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard2.c[526,539] [2022-01-31 03:34:25,473 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 03:34:25,480 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 03:34:25,489 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard2.c[526,539] [2022-01-31 03:34:25,505 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 03:34:25,516 INFO L208 MainTranslator]: Completed translation [2022-01-31 03:34:25,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:34:25 WrapperNode [2022-01-31 03:34:25,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 03:34:25,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 03:34:25,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 03:34:25,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 03:34:25,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:34:25" (1/1) ... [2022-01-31 03:34:25,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:34:25" (1/1) ... [2022-01-31 03:34:25,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:34:25" (1/1) ... [2022-01-31 03:34:25,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:34:25" (1/1) ... [2022-01-31 03:34:25,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:34:25" (1/1) ... [2022-01-31 03:34:25,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:34:25" (1/1) ... [2022-01-31 03:34:25,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:34:25" (1/1) ... [2022-01-31 03:34:25,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 03:34:25,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 03:34:25,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 03:34:25,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 03:34:25,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:34:25" (1/1) ... [2022-01-31 03:34:25,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 03:34:25,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:34:25,581 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 03:34:25,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 03:34:25,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 03:34:25,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 03:34:25,611 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 03:34:25,612 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 03:34:25,612 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 03:34:25,613 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 03:34:25,613 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 03:34:25,613 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 03:34:25,613 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 03:34:25,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 03:34:25,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 03:34:25,613 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 03:34:25,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 03:34:25,614 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 03:34:25,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 03:34:25,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 03:34:25,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 03:34:25,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 03:34:25,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 03:34:25,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 03:34:25,661 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 03:34:25,662 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 03:34:25,808 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 03:34:25,813 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 03:34:25,813 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 03:34:25,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 03:34:25 BoogieIcfgContainer [2022-01-31 03:34:25,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 03:34:25,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 03:34:25,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 03:34:25,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 03:34:25,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 03:34:25" (1/3) ... [2022-01-31 03:34:25,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33525421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 03:34:25, skipping insertion in model container [2022-01-31 03:34:25,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 03:34:25" (2/3) ... [2022-01-31 03:34:25,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33525421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 03:34:25, skipping insertion in model container [2022-01-31 03:34:25,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 03:34:25" (3/3) ... [2022-01-31 03:34:25,820 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2.c [2022-01-31 03:34:25,823 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-31 03:34:25,823 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 03:34:25,852 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 03:34:25,857 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 03:34:25,857 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 03:34:25,867 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 03:34:25,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 03:34:25,871 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:34:25,871 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:34:25,871 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:34:25,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:34:25,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1030421658, now seen corresponding path program 1 times [2022-01-31 03:34:25,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:34:25,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836235260] [2022-01-31 03:34:25,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:34:25,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:34:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:34:26,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:34:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:34:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:34:26,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:34:26,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836235260] [2022-01-31 03:34:26,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836235260] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 03:34:26,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 03:34:26,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 03:34:26,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136878265] [2022-01-31 03:34:26,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 03:34:26,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 03:34:26,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:34:26,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 03:34:26,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 03:34:26,116 INFO L87 Difference]: Start difference. First operand has 29 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:34:26,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:34:26,337 INFO L93 Difference]: Finished difference Result 66 states and 111 transitions. [2022-01-31 03:34:26,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 03:34:26,340 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-31 03:34:26,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:34:26,361 INFO L225 Difference]: With dead ends: 66 [2022-01-31 03:34:26,361 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 03:34:26,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 03:34:26,368 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 39 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 03:34:26,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 48 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 03:34:26,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 03:34:26,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2022-01-31 03:34:26,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 03:34:26,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-01-31 03:34:26,406 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 11 [2022-01-31 03:34:26,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:34:26,406 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-01-31 03:34:26,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:34:26,407 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-01-31 03:34:26,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 03:34:26,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:34:26,407 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:34:26,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 03:34:26,408 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:34:26,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:34:26,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1237898617, now seen corresponding path program 1 times [2022-01-31 03:34:26,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:34:26,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577272359] [2022-01-31 03:34:26,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:34:26,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:34:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:34:26,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:34:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:34:26,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 03:34:26,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:34:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 03:34:26,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:34:26,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577272359] [2022-01-31 03:34:26,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577272359] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 03:34:26,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 03:34:26,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 03:34:26,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108257501] [2022-01-31 03:34:26,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 03:34:26,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 03:34:26,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:34:26,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 03:34:26,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 03:34:26,481 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 03:34:26,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:34:26,635 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2022-01-31 03:34:26,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 03:34:26,636 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-01-31 03:34:26,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:34:26,637 INFO L225 Difference]: With dead ends: 41 [2022-01-31 03:34:26,638 INFO L226 Difference]: Without dead ends: 39 [2022-01-31 03:34:26,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 03:34:26,644 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 03:34:26,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 40 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 03:34:26,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-31 03:34:26,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2022-01-31 03:34:26,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 03:34:26,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-01-31 03:34:26,663 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 16 [2022-01-31 03:34:26,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:34:26,667 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-01-31 03:34:26,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 03:34:26,667 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-01-31 03:34:26,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 03:34:26,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:34:26,668 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:34:26,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 03:34:26,668 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:34:26,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:34:26,669 INFO L85 PathProgramCache]: Analyzing trace with hash 998817914, now seen corresponding path program 1 times [2022-01-31 03:34:26,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:34:26,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632605448] [2022-01-31 03:34:26,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:34:26,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:34:26,682 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 03:34:26,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553488709] [2022-01-31 03:34:26,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:34:26,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:34:26,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:34:26,700 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:34:26,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 03:34:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:34:26,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 03:34:26,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:34:26,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 03:34:26,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 03:34:26,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:34:26,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632605448] [2022-01-31 03:34:26,872 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 03:34:26,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553488709] [2022-01-31 03:34:26,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553488709] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 03:34:26,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 03:34:26,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 03:34:26,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629026406] [2022-01-31 03:34:26,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 03:34:26,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 03:34:26,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:34:26,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 03:34:26,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 03:34:26,874 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:34:26,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:34:26,916 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2022-01-31 03:34:26,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 03:34:26,916 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-01-31 03:34:26,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:34:26,917 INFO L225 Difference]: With dead ends: 60 [2022-01-31 03:34:26,917 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 03:34:26,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 03:34:26,919 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 03:34:26,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 115 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 03:34:26,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 03:34:26,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-01-31 03:34:26,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 03:34:26,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2022-01-31 03:34:26,927 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 21 [2022-01-31 03:34:26,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:34:26,927 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2022-01-31 03:34:26,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 03:34:26,928 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2022-01-31 03:34:26,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 03:34:26,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:34:26,928 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:34:26,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 03:34:27,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:34:27,148 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:34:27,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:34:27,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1073979732, now seen corresponding path program 1 times [2022-01-31 03:34:27,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:34:27,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951012299] [2022-01-31 03:34:27,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:34:27,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:34:27,158 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 03:34:27,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853734205] [2022-01-31 03:34:27,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:34:27,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:34:27,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:34:27,162 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:34:27,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 03:34:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:34:27,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 03:34:27,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:34:27,309 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 03:34:27,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 03:34:27,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:34:27,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951012299] [2022-01-31 03:34:27,310 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 03:34:27,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853734205] [2022-01-31 03:34:27,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853734205] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 03:34:27,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 03:34:27,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 03:34:27,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915774051] [2022-01-31 03:34:27,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 03:34:27,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 03:34:27,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:34:27,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 03:34:27,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 03:34:27,312 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 03:34:27,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:34:27,355 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2022-01-31 03:34:27,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 03:34:27,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-01-31 03:34:27,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:34:27,356 INFO L225 Difference]: With dead ends: 59 [2022-01-31 03:34:27,356 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 03:34:27,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 03:34:27,357 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 03:34:27,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 89 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 03:34:27,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 03:34:27,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-01-31 03:34:27,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 states have internal predecessors, (35), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 03:34:27,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-01-31 03:34:27,364 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 28 [2022-01-31 03:34:27,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:34:27,364 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-01-31 03:34:27,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 03:34:27,364 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-01-31 03:34:27,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 03:34:27,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:34:27,365 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:34:27,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 03:34:27,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 03:34:27,583 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:34:27,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:34:27,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1568039909, now seen corresponding path program 1 times [2022-01-31 03:34:27,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:34:27,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209688590] [2022-01-31 03:34:27,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:34:27,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:34:27,605 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 03:34:27,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134281537] [2022-01-31 03:34:27,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:34:27,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:34:27,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:34:27,608 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:34:27,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 03:34:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:34:27,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 03:34:27,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:34:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 03:34:27,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:34:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-31 03:34:27,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:34:27,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209688590] [2022-01-31 03:34:27,938 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 03:34:27,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134281537] [2022-01-31 03:34:27,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134281537] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 03:34:27,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 03:34:27,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-01-31 03:34:27,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289974433] [2022-01-31 03:34:27,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 03:34:27,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 03:34:27,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:34:27,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 03:34:27,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-31 03:34:27,940 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 03:34:27,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:34:27,995 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2022-01-31 03:34:27,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 03:34:27,996 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2022-01-31 03:34:27,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:34:27,998 INFO L225 Difference]: With dead ends: 63 [2022-01-31 03:34:27,998 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 03:34:27,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-31 03:34:27,999 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 03:34:28,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 99 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 03:34:28,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 03:34:28,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2022-01-31 03:34:28,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 36 states have internal predecessors, (39), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 03:34:28,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2022-01-31 03:34:28,013 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 38 [2022-01-31 03:34:28,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:34:28,013 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2022-01-31 03:34:28,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 03:34:28,014 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2022-01-31 03:34:28,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 03:34:28,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:34:28,015 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:34:28,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 03:34:28,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:34:28,233 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:34:28,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:34:28,234 INFO L85 PathProgramCache]: Analyzing trace with hash -697745896, now seen corresponding path program 1 times [2022-01-31 03:34:28,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:34:28,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585957519] [2022-01-31 03:34:28,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:34:28,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:34:28,241 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 03:34:28,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481271729] [2022-01-31 03:34:28,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:34:28,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:34:28,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:34:28,242 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:34:28,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 03:34:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:34:28,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 03:34:28,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:34:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-31 03:34:28,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:34:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-31 03:34:29,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:34:29,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585957519] [2022-01-31 03:34:29,454 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 03:34:29,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481271729] [2022-01-31 03:34:29,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481271729] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:34:29,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 03:34:29,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-01-31 03:34:29,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779979050] [2022-01-31 03:34:29,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 03:34:29,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 03:34:29,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:34:29,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 03:34:29,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-31 03:34:29,456 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-01-31 03:34:33,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:34:33,930 INFO L93 Difference]: Finished difference Result 148 states and 204 transitions. [2022-01-31 03:34:33,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 03:34:33,931 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 58 [2022-01-31 03:34:33,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:34:33,932 INFO L225 Difference]: With dead ends: 148 [2022-01-31 03:34:33,932 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 03:34:33,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-01-31 03:34:33,933 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 34 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:34:33,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 283 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 03:34:33,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 03:34:33,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 107. [2022-01-31 03:34:33,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 67 states have internal predecessors, (78), 32 states have call successors, (32), 12 states have call predecessors, (32), 11 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2022-01-31 03:34:33,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 140 transitions. [2022-01-31 03:34:33,948 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 140 transitions. Word has length 58 [2022-01-31 03:34:33,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:34:33,949 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 140 transitions. [2022-01-31 03:34:33,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-01-31 03:34:33,949 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 140 transitions. [2022-01-31 03:34:33,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 03:34:33,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:34:33,950 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:34:33,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 03:34:34,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:34:34,168 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:34:34,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:34:34,169 INFO L85 PathProgramCache]: Analyzing trace with hash -711069715, now seen corresponding path program 1 times [2022-01-31 03:34:34,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:34:34,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490488783] [2022-01-31 03:34:34,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:34:34,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:34:34,176 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 03:34:34,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379491200] [2022-01-31 03:34:34,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:34:34,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:34:34,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:34:34,192 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:34:34,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 03:34:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:34:34,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-31 03:34:34,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:34:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-01-31 03:34:34,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:34:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-01-31 03:34:34,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:34:34,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490488783] [2022-01-31 03:34:34,893 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 03:34:34,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379491200] [2022-01-31 03:34:34,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379491200] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:34:34,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 03:34:34,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-01-31 03:34:34,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18038773] [2022-01-31 03:34:34,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 03:34:34,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 03:34:34,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:34:34,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 03:34:34,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-01-31 03:34:34,895 INFO L87 Difference]: Start difference. First operand 107 states and 140 transitions. Second operand has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-01-31 03:34:35,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:34:35,190 INFO L93 Difference]: Finished difference Result 163 states and 213 transitions. [2022-01-31 03:34:35,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 03:34:35,190 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 69 [2022-01-31 03:34:35,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:34:35,192 INFO L225 Difference]: With dead ends: 163 [2022-01-31 03:34:35,192 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 03:34:35,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-01-31 03:34:35,193 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:34:35,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 141 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:34:35,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 03:34:35,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 95. [2022-01-31 03:34:35,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 60 states have internal predecessors, (67), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-31 03:34:35,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2022-01-31 03:34:35,205 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 69 [2022-01-31 03:34:35,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:34:35,219 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2022-01-31 03:34:35,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-01-31 03:34:35,220 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2022-01-31 03:34:35,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 03:34:35,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:34:35,221 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:34:35,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 03:34:35,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:34:35,422 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:34:35,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:34:35,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1018070448, now seen corresponding path program 1 times [2022-01-31 03:34:35,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:34:35,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036796669] [2022-01-31 03:34:35,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:34:35,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:34:35,429 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 03:34:35,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [94733311] [2022-01-31 03:34:35,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:34:35,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:34:35,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:34:35,431 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:34:35,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 03:34:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:34:35,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 03:34:35,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:34:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-01-31 03:34:35,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 03:34:35,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:34:35,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036796669] [2022-01-31 03:34:35,659 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 03:34:35,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94733311] [2022-01-31 03:34:35,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94733311] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 03:34:35,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 03:34:35,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 03:34:35,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575670911] [2022-01-31 03:34:35,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 03:34:35,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 03:34:35,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:34:35,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 03:34:35,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-31 03:34:35,661 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-01-31 03:34:35,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:34:35,702 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2022-01-31 03:34:35,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 03:34:35,703 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 78 [2022-01-31 03:34:35,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:34:35,704 INFO L225 Difference]: With dead ends: 109 [2022-01-31 03:34:35,704 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 03:34:35,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-31 03:34:35,705 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 03:34:35,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 98 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 03:34:35,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 03:34:35,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-01-31 03:34:35,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 59 states have (on average 1.152542372881356) internal successors, (68), 60 states have internal predecessors, (68), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-31 03:34:35,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 116 transitions. [2022-01-31 03:34:35,720 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 116 transitions. Word has length 78 [2022-01-31 03:34:35,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:34:35,721 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 116 transitions. [2022-01-31 03:34:35,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-01-31 03:34:35,721 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 116 transitions. [2022-01-31 03:34:35,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 03:34:35,722 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:34:35,722 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:34:35,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 03:34:35,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:34:35,940 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:34:35,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:34:35,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1256657556, now seen corresponding path program 2 times [2022-01-31 03:34:35,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:34:35,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338831168] [2022-01-31 03:34:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:34:35,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:34:35,948 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 03:34:35,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014700585] [2022-01-31 03:34:35,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:34:35,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:34:35,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:34:35,964 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:34:35,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 03:34:36,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:34:36,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:34:36,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-31 03:34:36,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:34:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-01-31 03:34:36,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:34:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-01-31 03:34:58,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:34:58,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338831168] [2022-01-31 03:34:58,226 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 03:34:58,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014700585] [2022-01-31 03:34:58,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014700585] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:34:58,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 03:34:58,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-01-31 03:34:58,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193674698] [2022-01-31 03:34:58,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 03:34:58,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 03:34:58,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:34:58,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 03:34:58,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-31 03:34:58,228 INFO L87 Difference]: Start difference. First operand 97 states and 116 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-01-31 03:35:12,651 WARN L228 SmtUtils]: Spent 13.97s on a formula simplification. DAG size of input: 192 DAG size of output: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:35:20,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 03:35:21,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:35:21,180 INFO L93 Difference]: Finished difference Result 222 states and 299 transitions. [2022-01-31 03:35:21,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 03:35:21,181 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 88 [2022-01-31 03:35:21,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:35:21,182 INFO L225 Difference]: With dead ends: 222 [2022-01-31 03:35:21,182 INFO L226 Difference]: Without dead ends: 171 [2022-01-31 03:35:21,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2022-01-31 03:35:21,183 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 85 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 191 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:35:21,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 498 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 520 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2022-01-31 03:35:21,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-31 03:35:21,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 160. [2022-01-31 03:35:21,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 96 states have (on average 1.21875) internal successors, (117), 100 states have internal predecessors, (117), 48 states have call successors, (48), 16 states have call predecessors, (48), 15 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-01-31 03:35:21,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 211 transitions. [2022-01-31 03:35:21,202 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 211 transitions. Word has length 88 [2022-01-31 03:35:21,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:35:21,202 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 211 transitions. [2022-01-31 03:35:21,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-01-31 03:35:21,203 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 211 transitions. [2022-01-31 03:35:21,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-31 03:35:21,204 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:35:21,204 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:35:21,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-31 03:35:21,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:35:21,422 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:35:21,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:35:21,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1035282000, now seen corresponding path program 1 times [2022-01-31 03:35:21,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:35:21,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698276452] [2022-01-31 03:35:21,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:35:21,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:35:21,429 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 03:35:21,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291619336] [2022-01-31 03:35:21,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:35:21,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:35:21,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:35:21,438 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:35:21,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 03:35:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:35:21,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 03:35:21,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:35:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-01-31 03:35:21,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:35:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-01-31 03:35:22,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:35:22,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698276452] [2022-01-31 03:35:22,492 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 03:35:22,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291619336] [2022-01-31 03:35:22,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291619336] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:35:22,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 03:35:22,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-01-31 03:35:22,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202877566] [2022-01-31 03:35:22,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 03:35:22,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 03:35:22,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:35:22,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 03:35:22,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-01-31 03:35:22,494 INFO L87 Difference]: Start difference. First operand 160 states and 211 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-01-31 03:35:22,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:35:22,771 INFO L93 Difference]: Finished difference Result 176 states and 233 transitions. [2022-01-31 03:35:22,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 03:35:22,771 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) Word has length 104 [2022-01-31 03:35:22,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:35:22,772 INFO L225 Difference]: With dead ends: 176 [2022-01-31 03:35:22,772 INFO L226 Difference]: Without dead ends: 168 [2022-01-31 03:35:22,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 195 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-01-31 03:35:22,773 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 7 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:35:22,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 348 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:35:22,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-01-31 03:35:22,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-01-31 03:35:22,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 100 states have (on average 1.21) internal successors, (121), 104 states have internal predecessors, (121), 52 states have call successors, (52), 16 states have call predecessors, (52), 15 states have return successors, (50), 47 states have call predecessors, (50), 50 states have call successors, (50) [2022-01-31 03:35:22,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 223 transitions. [2022-01-31 03:35:22,795 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 223 transitions. Word has length 104 [2022-01-31 03:35:22,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:35:22,796 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 223 transitions. [2022-01-31 03:35:22,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-01-31 03:35:22,796 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 223 transitions. [2022-01-31 03:35:22,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-31 03:35:22,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:35:22,800 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:35:22,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-31 03:35:23,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 03:35:23,013 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:35:23,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:35:23,014 INFO L85 PathProgramCache]: Analyzing trace with hash -373074263, now seen corresponding path program 2 times [2022-01-31 03:35:23,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:35:23,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048331062] [2022-01-31 03:35:23,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:35:23,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:35:23,022 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 03:35:23,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245544847] [2022-01-31 03:35:23,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:35:23,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:35:23,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:35:23,024 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:35:23,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 03:35:23,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:35:23,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:35:23,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 03:35:23,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:35:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 102 proven. 42 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2022-01-31 03:35:23,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:35:23,467 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-01-31 03:35:23,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:35:23,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048331062] [2022-01-31 03:35:23,468 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 03:35:23,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245544847] [2022-01-31 03:35:23,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245544847] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:35:23,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 03:35:23,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-01-31 03:35:23,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715302619] [2022-01-31 03:35:23,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 03:35:23,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 03:35:23,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:35:23,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 03:35:23,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-31 03:35:23,469 INFO L87 Difference]: Start difference. First operand 168 states and 223 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2022-01-31 03:35:23,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:35:23,538 INFO L93 Difference]: Finished difference Result 197 states and 260 transitions. [2022-01-31 03:35:23,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 03:35:23,540 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) Word has length 117 [2022-01-31 03:35:23,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:35:23,541 INFO L225 Difference]: With dead ends: 197 [2022-01-31 03:35:23,541 INFO L226 Difference]: Without dead ends: 130 [2022-01-31 03:35:23,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 223 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-31 03:35:23,542 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 4 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 03:35:23,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 149 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 03:35:23,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-31 03:35:23,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-01-31 03:35:23,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 82 states have internal predecessors, (91), 36 states have call successors, (36), 16 states have call predecessors, (36), 15 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2022-01-31 03:35:23,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 161 transitions. [2022-01-31 03:35:23,556 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 161 transitions. Word has length 117 [2022-01-31 03:35:23,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:35:23,556 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 161 transitions. [2022-01-31 03:35:23,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2022-01-31 03:35:23,557 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 161 transitions. [2022-01-31 03:35:23,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-01-31 03:35:23,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:35:23,558 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:35:23,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-31 03:35:23,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:35:23,775 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:35:23,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:35:23,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1955703384, now seen corresponding path program 3 times [2022-01-31 03:35:23,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:35:23,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552519525] [2022-01-31 03:35:23,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:35:23,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:35:23,785 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 03:35:23,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676675042] [2022-01-31 03:35:23,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:35:23,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:35:23,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:35:23,790 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:35:23,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 03:35:23,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 03:35:23,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:35:23,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-31 03:35:23,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:35:24,193 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 03:35:24,226 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 03:35:24,271 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 03:35:24,336 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 03:35:24,406 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-01-31 03:35:24,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:35:32,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:35:32,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552519525] [2022-01-31 03:35:32,664 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 03:35:32,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676675042] [2022-01-31 03:35:32,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676675042] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:35:32,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 03:35:32,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-01-31 03:35:32,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837700074] [2022-01-31 03:35:32,664 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 03:35:32,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 03:35:32,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:35:32,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 03:35:32,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=121, Unknown=1, NotChecked=0, Total=156 [2022-01-31 03:35:32,666 INFO L87 Difference]: Start difference. First operand 130 states and 161 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-31 03:35:32,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:35:32,796 INFO L93 Difference]: Finished difference Result 136 states and 166 transitions. [2022-01-31 03:35:32,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 03:35:32,797 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 118 [2022-01-31 03:35:32,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:35:32,798 INFO L225 Difference]: With dead ends: 136 [2022-01-31 03:35:32,798 INFO L226 Difference]: Without dead ends: 132 [2022-01-31 03:35:32,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=45, Invalid=164, Unknown=1, NotChecked=0, Total=210 [2022-01-31 03:35:32,799 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 03:35:32,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 79 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 03:35:32,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-31 03:35:32,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 112. [2022-01-31 03:35:32,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 69 states have internal predecessors, (77), 28 states have call successors, (28), 16 states have call predecessors, (28), 14 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-31 03:35:32,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 131 transitions. [2022-01-31 03:35:32,818 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 131 transitions. Word has length 118 [2022-01-31 03:35:32,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:35:32,818 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 131 transitions. [2022-01-31 03:35:32,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-31 03:35:32,818 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 131 transitions. [2022-01-31 03:35:32,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-31 03:35:32,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:35:32,820 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:35:32,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 03:35:33,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 03:35:33,044 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:35:33,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:35:33,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1954867963, now seen corresponding path program 3 times [2022-01-31 03:35:33,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:35:33,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88777688] [2022-01-31 03:35:33,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:35:33,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:35:33,052 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 03:35:33,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96113644] [2022-01-31 03:35:33,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:35:33,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:35:33,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:35:33,056 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:35:33,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 03:35:33,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 03:35:33,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:35:33,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 03:35:33,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:35:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2022-01-31 03:35:33,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:35:33,568 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2022-01-31 03:35:33,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:35:33,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88777688] [2022-01-31 03:35:33,569 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 03:35:33,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96113644] [2022-01-31 03:35:33,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96113644] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:35:33,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 03:35:33,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-01-31 03:35:33,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294972244] [2022-01-31 03:35:33,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 03:35:33,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 03:35:33,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:35:33,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 03:35:33,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-31 03:35:33,570 INFO L87 Difference]: Start difference. First operand 112 states and 131 transitions. Second operand has 12 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-01-31 03:35:33,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:35:33,683 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2022-01-31 03:35:33,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 03:35:33,683 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 121 [2022-01-31 03:35:33,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:35:33,683 INFO L225 Difference]: With dead ends: 120 [2022-01-31 03:35:33,683 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 03:35:33,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-01-31 03:35:33,686 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 03:35:33,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 85 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 03:35:33,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 03:35:33,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 03:35:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-31 03:35:33,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 03:35:33,687 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 121 [2022-01-31 03:35:33,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:35:33,687 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 03:35:33,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-01-31 03:35:33,688 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 03:35:33,688 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 03:35:33,690 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 03:35:33,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 03:35:33,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 03:35:33,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-01-31 03:35:43,758 WARN L228 SmtUtils]: Spent 8.14s on a formula simplification. DAG size of input: 144 DAG size of output: 16 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-01-31 03:35:51,432 WARN L228 SmtUtils]: Spent 6.86s on a formula simplification. DAG size of input: 146 DAG size of output: 32 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-01-31 03:35:51,435 INFO L858 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-01-31 03:35:51,435 INFO L858 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-01-31 03:35:51,435 INFO L858 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-01-31 03:35:51,436 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 11 13) no Hoare annotation was computed. [2022-01-31 03:35:51,436 INFO L858 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-01-31 03:35:51,436 INFO L858 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2022-01-31 03:35:51,436 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2022-01-31 03:35:51,436 INFO L854 garLoopResultBuilder]: At program point L33-2(lines 33 41) the Hoare annotation is: (let ((.cse3 (* main_~B~0 main_~q~0))) (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~B~0 1)) (.cse2 (= (+ .cse3 main_~r~0) main_~A~0))) (or (and .cse0 .cse1 .cse2 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse0 .cse1 .cse2) (and (<= 1 (div (div main_~p~0 2) 2)) (= (+ main_~A~0 main_~d~0) (+ (* main_~B~0 main_~p~0) .cse3 main_~r~0)) .cse0 .cse1 .cse2)))) [2022-01-31 03:35:51,436 INFO L858 garLoopResultBuilder]: For program point L58(line 58) no Hoare annotation was computed. [2022-01-31 03:35:51,436 INFO L858 garLoopResultBuilder]: For program point mainEXIT(lines 22 60) no Hoare annotation was computed. [2022-01-31 03:35:51,436 INFO L858 garLoopResultBuilder]: For program point mainFINAL(lines 22 60) no Hoare annotation was computed. [2022-01-31 03:35:51,436 INFO L854 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (and (= (* main_~B~0 main_~p~0) main_~d~0) (<= 1 main_~p~0) (= main_~B~0 1) (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0)) [2022-01-31 03:35:51,436 INFO L854 garLoopResultBuilder]: At program point L44-1(line 44) the Hoare annotation is: (let ((.cse1 (* main_~B~0 main_~q~0))) (let ((.cse0 (div main_~p~0 2)) (.cse2 (= (+ .cse1 main_~r~0) main_~A~0))) (or (and (<= 1 .cse0) (= (+ main_~A~0 main_~d~0) (+ (* main_~B~0 main_~p~0) .cse1 main_~r~0)) (= main_~B~0 1) .cse2) (and (= (let ((.cse3 (div main_~d~0 2))) (+ (div .cse3 2) main_~A~0 .cse3)) (+ .cse1 main_~r~0 (* main_~B~0 (div .cse0 2)) (* main_~B~0 .cse0))) (<= 1 main_~B~0) .cse2 (= main_~B~0 main_~d~0) (= main_~p~0 1))))) [2022-01-31 03:35:51,437 INFO L858 garLoopResultBuilder]: For program point L36(lines 33 41) no Hoare annotation was computed. [2022-01-31 03:35:51,437 INFO L854 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (let ((.cse3 (* main_~B~0 main_~q~0))) (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~B~0 1)) (.cse2 (= (+ .cse3 main_~r~0) main_~A~0))) (or (and .cse0 .cse1 .cse2 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse0 .cse1 .cse2) (and (<= 1 (div (div main_~p~0 2) 2)) (= (+ main_~A~0 main_~d~0) (+ (* main_~B~0 main_~p~0) .cse3 main_~r~0)) .cse0 .cse1 .cse2)))) [2022-01-31 03:35:51,437 INFO L854 garLoopResultBuilder]: At program point L34-1(line 34) the Hoare annotation is: (let ((.cse3 (* main_~B~0 main_~q~0))) (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~B~0 1)) (.cse2 (= (+ .cse3 main_~r~0) main_~A~0))) (or (and .cse0 .cse1 .cse2 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse0 .cse1 .cse2) (and (<= 1 (div (div main_~p~0 2) 2)) (= (+ main_~A~0 main_~d~0) (+ (* main_~B~0 main_~p~0) .cse3 main_~r~0)) .cse0 .cse1 .cse2)))) [2022-01-31 03:35:51,437 INFO L861 garLoopResultBuilder]: At program point mainENTRY(lines 22 60) the Hoare annotation is: true [2022-01-31 03:35:51,437 INFO L854 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (let ((.cse0 (= main_~B~0 main_~d~0))) (or (and (= main_~B~0 1) .cse0 (= main_~p~0 1)) (and (<= 1 main_~B~0) (= (+ (* main_~d~0 main_~q~0) main_~r~0) main_~A~0) (<= 1 main_~p~0) .cse0))) [2022-01-31 03:35:51,437 INFO L858 garLoopResultBuilder]: For program point L51(lines 51 54) no Hoare annotation was computed. [2022-01-31 03:35:51,437 INFO L858 garLoopResultBuilder]: For program point L51-2(lines 22 60) no Hoare annotation was computed. [2022-01-31 03:35:51,437 INFO L858 garLoopResultBuilder]: For program point L45(lines 43 55) no Hoare annotation was computed. [2022-01-31 03:35:51,437 INFO L854 garLoopResultBuilder]: At program point L43-1(lines 43 55) the Hoare annotation is: (and (<= 1 main_~B~0) (= (+ (* main_~d~0 main_~q~0) main_~r~0) main_~A~0) (<= 1 main_~p~0) (= main_~B~0 main_~d~0)) [2022-01-31 03:35:51,437 INFO L854 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse3 (* main_~B~0 main_~q~0))) (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~B~0 1)) (.cse2 (= (+ .cse3 main_~r~0) main_~A~0))) (or (and .cse0 .cse1 .cse2 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse0 .cse1 .cse2) (and (<= 1 (div (div main_~p~0 2) 2)) (= (+ main_~A~0 main_~d~0) (+ (* main_~B~0 main_~p~0) .cse3 main_~r~0)) .cse0 .cse1 .cse2)))) [2022-01-31 03:35:51,437 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-01-31 03:35:51,437 INFO L854 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-01-31 03:35:51,437 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-01-31 03:35:51,438 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-01-31 03:35:51,438 INFO L861 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-01-31 03:35:51,438 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-01-31 03:35:51,438 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-01-31 03:35:51,438 INFO L858 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-01-31 03:35:51,438 INFO L858 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-01-31 03:35:51,438 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-01-31 03:35:51,438 INFO L858 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-01-31 03:35:51,438 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-01-31 03:35:51,438 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-01-31 03:35:51,441 INFO L732 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:35:51,442 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 03:35:51,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 03:35:51 BoogieIcfgContainer [2022-01-31 03:35:51,464 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 03:35:51,464 INFO L158 Benchmark]: Toolchain (without parser) took 86163.02ms. Allocated memory was 197.1MB in the beginning and 354.4MB in the end (delta: 157.3MB). Free memory was 146.5MB in the beginning and 161.1MB in the end (delta: -14.6MB). Peak memory consumption was 187.6MB. Max. memory is 8.0GB. [2022-01-31 03:35:51,465 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 197.1MB. Free memory is still 163.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 03:35:51,468 INFO L158 Benchmark]: CACSL2BoogieTranslator took 213.70ms. Allocated memory was 197.1MB in the beginning and 245.4MB in the end (delta: 48.2MB). Free memory was 146.3MB in the beginning and 223.2MB in the end (delta: -76.9MB). Peak memory consumption was 10.2MB. Max. memory is 8.0GB. [2022-01-31 03:35:51,468 INFO L158 Benchmark]: Boogie Preprocessor took 39.17ms. Allocated memory is still 245.4MB. Free memory was 223.2MB in the beginning and 221.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 03:35:51,468 INFO L158 Benchmark]: RCFGBuilder took 255.49ms. Allocated memory is still 245.4MB. Free memory was 221.6MB in the beginning and 210.6MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-01-31 03:35:51,468 INFO L158 Benchmark]: TraceAbstraction took 85648.39ms. Allocated memory was 245.4MB in the beginning and 354.4MB in the end (delta: 109.1MB). Free memory was 210.1MB in the beginning and 161.1MB in the end (delta: 49.0MB). Peak memory consumption was 201.5MB. Max. memory is 8.0GB. [2022-01-31 03:35:51,470 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 197.1MB. Free memory is still 163.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 213.70ms. Allocated memory was 197.1MB in the beginning and 245.4MB in the end (delta: 48.2MB). Free memory was 146.3MB in the beginning and 223.2MB in the end (delta: -76.9MB). Peak memory consumption was 10.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 39.17ms. Allocated memory is still 245.4MB. Free memory was 223.2MB in the beginning and 221.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 255.49ms. Allocated memory is still 245.4MB. Free memory was 221.6MB in the beginning and 210.6MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 85648.39ms. Allocated memory was 245.4MB in the beginning and 354.4MB in the end (delta: 109.1MB). Free memory was 210.1MB in the beginning and 161.1MB in the end (delta: 49.0MB). Peak memory consumption was 201.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 85.6s, OverallIterations: 13, TraceHistogramMax: 20, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 29.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 17.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 369 SdHoareTripleChecker+Valid, 7.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 307 mSDsluCounter, 2072 SdHoareTripleChecker+Invalid, 7.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1611 mSDsCounter, 428 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1770 IncrementalHoareTripleChecker+Invalid, 2199 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 428 mSolverCounterUnsat, 461 mSDtfsCounter, 1770 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1477 GetRequests, 1334 SyntacticMatches, 22 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 28.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=168occurred in iteration=10, InterpolantAutomatonStates: 97, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 75 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 13 LocationsWithAnnotation, 126 PreInvPairs, 186 NumberOfFragments, 453 HoareAnnotationTreeSize, 126 FomulaSimplifications, 538 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 13 FomulaSimplificationsInter, 13266 FormulaSimplificationTreeSizeReductionInter, 16.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 35.5s InterpolantComputationTime, 867 NumberOfCodeBlocks, 745 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1442 ConstructedInterpolants, 0 QuantifiedInterpolants, 15863 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1855 ConjunctsInSsa, 195 ConjunctsInUnsatCore, 20 InterpolantComputations, 6 PerfectInterpolantSequences, 6338/6540 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: (((((q == 0 && B == 1) && B * q + r == A) && B == d) && p == 1) || ((((B * 2 == d && p == 2) && q == 0) && B == 1) && B * q + r == A)) || ((((1 <= p / 2 / 2 && A + d == B * p + B * q + r) && q == 0) && B == 1) && B * q + r == A) RESULT: Ultimate proved your program to be correct! [2022-01-31 03:35:51,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...